Iam using this phone too.It have a great interface and marshmallow andriod version in built.its great to use it with more advanced features than galaxy j7, such as fingerprint sensor and more battery backup and camera.
It have 32 gb internal memory.Its pretty good in samsung phones at least price with best features.i bought it at rs.18500 /- and its still ok.
But have hanging problems, more battery drainage and all.